How do you compare 2 large files to make sure they are the same

[snake253]

I used DiskImage to backup my system to my harddrive. From there the backup file is burned on to a CD. Is there a program that will read the 2 files( disk drive vs CD-R) to make sure the data is the same. I really need to do this before I erase the file on my harddrive.

 

[Automan]

I normally use Filesync. It is shareware, but I think you can get a 30 day trial from the site. Once you load and start it, go into it's Options/Preferences, and you can enable the 'Binary Compare' feature. Once that is enabled then just run a binary compare of the 2 images and I think this will get you what you want. Hope this helps.

 

[CodeJockey]

Try the COMP util that comes with windows...

C:\WINNT\system32\comp.EXE

Compares the contents of two files or sets of files.

COMP [data1] [data2] [/D] [/A] [/L] [/N=number] [/C]

data1 Specifies location and name(s) of first file(s) to compare.
data2 Specifies location and name(s) of second files to compare.
/D Displays differences in decimal format.
/A Displays differences in ASCII characters.
/L Displays line numbers for differences.
/N=number Compares only the first specified number of lines in each file.
/C Disregards case of ASCII letters when comparing files.

To compare sets of files, use wildcards in data1 and data2 parameters.

 

[snake253]

Thanks CodeJockey , comp work great. Only found this program on WIN2000 though. Now I finally have a reason to install Win2000.